Son Donglu, a newly promoted detective teams up with Guo Zhui, fastest gunman in Tiancheng and Xiaowu, a novice policeman to investigate the mystery deaths in a bullet factory.Son Donglu, a newly promoted detective teams up with Guo Zhui, fastest gunman in Tiancheng and Xiaowu, a novice policeman to investigate the mystery deaths in a bullet factory.Son Donglu, a newly promoted detective teams up with Guo Zhui, fastest gunman in Tiancheng and Xiaowu, a novice policeman to investigate the mystery deaths in a bullet factory.